(19)
(11) EP 1 484 183 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
04.05.2005 Bulletin 2005/18

(43) Date of publication A2:
08.12.2004 Bulletin 2004/50

(21) Application number: 04012928.0

(22) Date of filing: 01.06.2004
(51) International Patent Classification (IPC)7: B41J 2/205, B41J 2/21
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL HR LT LV MK

(30) Priority: 02.06.2003 JP 2003156449

(71) Applicant: SONY CORPORATION
Tokyo (JP)

(72) Inventors:
  • Eguchi, Takeo
    Shinagawa-ku, Tokyo (JP)
  • Takenaka, Kazuyasu
    Shinagawa-ku, Tokyo (JP)
  • Takahashi, Takanori
    Shinagawa-ku, Tokyo (JP)
  • Ujiie, Ichiro
    Shinagawa-ku, Tokyo (JP)

(74) Representative: Müller - Hoffmann & Partner 
Patentanwälte, Innere Wiener Strasse 17
81667 München
81667 München (DE)

   


(54) Liquid-discharging apparatus, and density adjusting method and system of the same


(57) A density-adjusting method of a liquid-discharging apparatus having a head (11) including a plurality of juxtaposed liquid-discharging units (12,13,18) having respective nozzles (18), forming dots by landing droplets discharged from the nozzles onto a droplet-landing object, and providing half tones by arranging a dot array is provided. A density-measuring pattern including all pixel trains lying in the main scanning direction with a constant density is formed, the density of the pattern is scanned so as to obtain density information and the relationship between the number and the density of droplets with respect to each pixel train. Upon receipt of a discharge command signal, based on the obtained data with respect to each pixel train, the density of the pixel train corresponding to the discharge command signal is adjusted by making the number of droplets to be actually discharged from the nozzles different from that of droplets discharged according to the discharge command signal.






Search report